[enh] donation tool migration from Flattr to Liberapay

- Remove Flattr logo and mention
- Add Liberapay logo and mention

images/liberapay_logo.svg

@@ -0,0 +1,2 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="83" height="30"><rect id="back" fill="#f6c915" x="1" y=".5" width="82" height="29" rx="4"/><svg viewBox="0 0 80 80" height="16" width="16" x="7" y="7"><g transform="translate(-78.37-208.06)" fill="#1a171b"><path d="m104.28 271.1c-3.571 0-6.373-.466-8.41-1.396-2.037-.93-3.495-2.199-4.375-3.809-.88-1.609-1.308-3.457-1.282-5.544.025-2.086.313-4.311.868-6.675l9.579-40.05 11.69-1.81-10.484 43.44c-.202.905-.314 1.735-.339 2.489-.026.754.113 1.421.415 1.999.302.579.817 1.044 1.546 1.395.729.353 1.747.579 3.055.679l-2.263 9.278"/><path d="m146.52 246.14c0 3.671-.604 7.03-1.811 10.07-1.207 3.043-2.879 5.669-5.01 7.881-2.138 2.213-4.702 3.935-7.693 5.167-2.992 1.231-6.248 1.848-9.767 1.848-1.71 0-3.42-.151-5.129-.453l-3.394 13.651h-11.162l12.52-52.19c2.01-.603 4.311-1.143 6.901-1.622 2.589-.477 5.393-.716 8.41-.716 2.815 0 5.242.428 7.278 1.282 2.037.855 3.708 2.024 5.02 3.507 1.307 1.484 2.274 3.219 2.904 5.205.627 1.987.942 4.11.942 6.373m-27.378 15.461c.854.202 1.91.302 3.167.302 1.961 0 3.746-.364 5.355-1.094 1.609-.728 2.979-1.747 4.111-3.055 1.131-1.307 2.01-2.877 2.64-4.714.628-1.835.943-3.858.943-6.071 0-2.161-.479-3.998-1.433-5.506-.956-1.508-2.615-2.263-4.978-2.263-1.61 0-3.118.151-4.525.453l-5.28 21.948"/></g></svg><text fill="#1a171b" text-anchor="middle" font-family="Helvetica Neue,Helvetica,Arial,sans-serif"
+          font-weight="700" font-size="14" x="50" y="20">Donate</text></svg>

index.md

@@ -108,7 +108,9 @@
 
   <div class="text-center">
     <h1>Hey! We are humans!<br /><small> If you have questions, problems or if you are just an enthusiast, leave a message on our chatroom by clicking on the button below &nbsp;<span class="glyphicon glyphicon-share-alt"></span> </small></h1>
-    <a href="http://flattr.com/thing/3164470/YunoHost-web-site" target="_blank"><img src="/images/flattr-badge-large.png" alt="Flattr this" title="Flattr this" border="0" /></a>
+    <p class="liberapay">
+     <a href="https://liberapay.com/YunoHost" target="_blank"><img src="/images/liberapay_logo.svg" alt="Donation button" title="Liberapay" /></a>
+    </p>
   </div>
 
 </div><!-- boring-part -->

index_es.md

@@ -104,7 +104,9 @@
 
   <div class="text-center">
     <h1>¡ Hey ! Somos humanos<br /><small> Si tiene algun pregunta, un problema, o simplemente estás interesado, ven decir "¡ Hola !" sobre nuetra salón de discusión clic en el botón abajo &nbsp;<span class="glyphicon glyphicon-share-alt"></span> </small></h1>
-    <a href="http://flattr.com/thing/3164470/YunoHost-web-site" target="_blank"><img src="/images/flattr-badge-large.png" alt="Flattr this" title="Flattr this" border="0" /></a>
+   <p class="liberapay">
+   <a href="https://liberapay.com/YunoHost" target="_blank"><img src="/images/liberapay_logo.svg" alt="Donation button" title="Liberapay" /></a>
+   </p>
   </div>
 
 </div><!-- boring-part -->

index_fr.md

@@ -108,8 +108,8 @@
 
   <div class="text-center">
     <h1>Hey ! Nous sommes humains !<br /><small> Si vous avez une question, un problème, ou que vous êtes tout simplement intéressé, passez dire « Bonjour » sur notre salon de discussion en cliquant sur le bouton en bas &nbsp;<span class="glyphicon glyphicon-share-alt"></span> </small></h1>
-    <p class="flattr">
+    <p class="liberapay">
-      <a href="http://flattr.com/thing/3164470/YunoHost-web-site" target="_blank"><img src="/images/flattr-badge-large.png" alt="Flattr this" title="Flattr this" border="0" /></a>
+      <a href="https://liberapay.com/YunoHost" target="_blank"><img src="/images/liberapay_logo.svg" alt="Donation button" title="Liberapay" /></a>
     </p>
   </div>